American Airlines is reportedly considering consolidating its business with a single credit card partner, potentially by making Citigroup its exclusive partner and dropping Barclays.The airline’s talks with banks and card networks are ongoing and the timing of an agreement is unknown, CNBC reported Friday (Sept. 20), citing unnamed sources.A deal could also face scrutiny from U.S. regulators, which in turn could delay or cancel any changes to the current arrangements, according to the report.Responding to t ...